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Daewoo Matiz (2003 year). Manual - part 289

9T – 12 IMMOBILIZER ANTI-THEFT SYSTEM

DAEWOO M–150 BL2

3. If the ECM doesn’t receive a response message with-

in a defined time from beginning of the release time
period or the ECM receives a no release answer

→

the ECM enters the blocked state, which causes the

activation of the immobilization actions of the engine.

The inactive state of the Immobilizer (valid key/invalid
key) ends with turning off the ignition.

SECURITY INDICATOR

There is a security indicator on the instrument panel.

Status LED

An external LED displays the immobilizer system status.
The immobilizer contains the LED driver hardware for di-
rect connection of one LED.

Status LED Modes

Status

LED

Immobilizer

System Status

Note

Blinking

Active

– Ignition OFF

Blinking

Active

– Invalid key

detected

– Ignition ON

OFF

Inactive

– Valid key detected
– Ignition ON

Blinking

Active

– VIN-code is

different between
ICU and ECM in
learnt state

– Ignition ON

Active

– Transponder

reading error

– Ignition ON

Blinking

Active

– Reader exciter

ASIC error

– Ignition OFF

IMMOBILIZER ANTI-THEFT SYSTEM 9T – 13

DAEWOO M–150 BL2

DIAGNOSTIC INFORMATION AND PROCEDURES

IMMOBILIZER SYSTEM (FENIX 5MR)

The immobilizer anti-theft system requires diagnosis
when it is not possible to start the engine. If the no-start
condition occurs because of the immobilizer system, a
diagnostic trouble code (DTC) 1600, 1601 or
1602 should be set.

The immobilizer control unit monitors the detection and
the reading of the ignition key. The self-test capacity is
limited to those functions. Faults are communicated to a
scan tool during diagnosis, but they are not stored in the
immobilizer control unit’s memory.

Unauthorized use of a scan tool could be a method of
defeating the immobilizer anti-theft system, so certain
scan tool procedures require the use of a password. The
following functions are password protected:

Coding of an additional key.

Deleting all key codes.

Deletion of the immobilizer identification (ID) code.

Deletion of the electronic control module (ECM) ID
code.

The following functions do not require a password:

Reading an ignition key to determine if the transpond-
er is working or if a key is authorized.

Reading the immobilizer ID code to verify that it
matches the ECM ID code.

IMMOBILIZER SYSTEM (SIRIUS D3)

Coding of an additional key.

Deleting all key codes.

The following functions do not require a password:

Reading an ignition key to determine if the transpond-
er is working or if a key is authorized.

Reading the immobilizer ID code to verify that it
matches the ECM ID code.

9T – 14 IMMOBILIZER ANTI-THEFT SYSTEM

DAEWOO M–150 BL2

D19T002B

DIAGNOSTIC TROUBLE CODE (DTC) 1600

ECM IMMOBILIZER ERROR (NO ANSWER)

Circuit Description

When the ignition is turned ON, the key is tested by the
immobilizer anti-theft system. While the key code is be-
ing read by the immobilizer control unit, the engine can
start and run with any key that will turn the lock cylinder.
The key code is read and compared with key codes that
have been stored in the memory of the immobilizer con-
trol unit. If a valid key is detected, the immobilizer control
unit sends a serial data release message to the elec-
tronic control module (ECM). Included in the release
message is an identification (ID) code which assures
that neither the immobilizer control unit nor the ECM has
been substituted to defeat the system. If the ECM re-
ceives an invalid release message, the ECM performs
the following actions:

Disables the fuel injector circuit.

Disables the fuel pump circuit.

Disables the ignition coil.

DTC Will Set When

The ECM does not receive the signal from the immo-
bilizer control module when the ignition is turned on.

The above conditions are maintained until the ignition
is switched OFF.

DTC 1600 Will Clear When

The ignition switch is turned OFF or the scan tool
TROUBLE CODE CLEAR command is issued.

IMMOBILIZER ANTI-THEFT SYSTEM 9T – 15

DAEWOO M–150 BL2

DTC 1600 – ECM Immobilizer Error (No Answer)

Step

Action

Value

Yes

Connect the scan tool using the following procedure:
1. Insert the cartridge into the scan tool.
2. Turn the ignition switch to the OFF position.
3. Connect the scan tool to the data link connector

(DLC).

4. Connect the scan tool’s power cord to the cigar

lighter socket.

5. Turn the ignition ON, but do not start the engine.
Is communication established between the scan tool
and the immobilizer control unit?

–

Go to Step 2

Go to

“Communi-

cation

Between

Immobilizer

and Test

Equipment”

Select CURRENT KEY STATUS from the scan tool
menu.
Did the STATUS OF CURRENT KEY message
indicate “KEY IS WRONG”?

–

Go to “Key

Status Errors”

Go to Step 3

Read the IMMO & ECM ID

CODE message that

was displayed after requesting DIAGNOSIS.
Did the message differ from normal message?
Normal Message – ECM MODE: LEARNT

IMMO. MODE: LEARNT
VIN CODE: SAME

–

Go to

“Identification

(ID) Code

Repro-

gramming”

Go to Step 4

Check for an open serial data wire between the
immobilizer control unit and the ECM.
Was the circuit open?

–

Go to Step 5

Go to Step 6

Repair the open serial data wire between the ECM
and the immobilizer control unit.
Is the repair complete?

–

System OK

–

1. Replace the ECM.
2. Reprogram the identification (ID) code. Refer to

“Identification (ID) Code Reprogramming” in this
section.

Is the repair complete?

–

System OK

–

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